Adjustable clamp



FIG. 1 is a perspective view of the adjustable clamp illustrating my new design;

FIG. 2 is a side elevational view of the adjustable clamp of FIG. 1, the other side having the same appearance;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front end elevational view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a adjustable clamp, as shown and described. 